"海上列车"静水及波浪中的水动力特性研究OACSTPCD

To investigate the motion characteristics and resistance performance of the new multi-vessel navigation concept"sea train"in waves,a coupling approach of potential and viscous flows based on functional decomposition model was developed.The Blunt Wigley ship model was selected,and 3 Blunt Wigley ship models were arranged in series with a longitudinal spacing of 0.1L to construct a multi-vessel system.The in-house coupling solver of potential and viscous flows HUST-SWENSE and the in-house structured dynamic overset grid code HUST-Overset were used to solve ship motions in waves.Comparing the resistance performance of single vessel with these of multi-vessel system in calm water,it is found that the drag reduction of the lead ship in the connected"sea train"is obvious,while the subsequent ships have different degrees of drag increases,and that of the ship at the rearmost position arrives the maximum.By comparison and analysis of motion responses,added resistance and different components of wave systems of single ship and multi-vessel system in waves,it is found that when r is more than 0.25,the motion characteristics and added resistance characteristics of the lead ship are almost the same as the single ship.In addition,the subsequent ships need to adjust the longitudinal distances between ships according to the specific sea conditions to achieve the purpose of drag reduction.